490 Dr. Cantor on the Flora and Fauna of CJmsan. 



alatd, tumidiuscula, facie externa tuberculato-plicat^, rugis seriebus 

 duabus e linea umbonali divaricantibus, posterioribus simplicioribus, 

 anterioribus basalibusque plerumque nodulosis ; natibus mediocriter 

 promineiitibus ; epidermide nigrescente, striis subimbricatis. Valvse 

 sinistrse dente cardinal! interiori versus angulum marginis posterioris 

 basalisque spectante, ad latus exterius laminis pluribus munito, dente 

 exterior! pen^ obsolete, brev!, a basi interioris divaricate ; dente la- 

 teral! brev! crasso. Long. 2-65, lat. 3*5 poll. 



*Corbicula fuscata. Testa cordata subinsequilaterali, fusco-virente, 

 tumidiuscula, polita, intus et ad nates violacea, extrinsecus sulcis 

 crebris circuradata, rugis intersitis subimbricatis ; margine interiori 

 plerumque nigrescente; natibus decorticatis. Lat. 1*3, long. 1*15 

 poll. 



Habitat. Canals. 



Venus sinensis, Auct. Testa orbiculata, convexa, albid^, margi- 

 nibus violaceis, denticulatis, extrinsecus radiis violaceis plicisque 

 concentricis exilissimis ornata ; disco plerumque feiTugineo, dente 

 cardinal! postico bifido, ssepe bilobato, laminse cardinalis extremitate 

 postica concava. Long. r7, lat. 1*65 poll. 



Habitat. Said to inhabit canals. 



*Sanguinolaria iridescens. Testa subelliptica, compressa, albida, 

 iridescente, versus apicem incarnata, exilissime transverse striatJi, 

 striis obsoletis radiatim decussate ; latere postico subrostrato, sub- 

 angulato, antico longiore, rotundato. 



Habitat. Said to inhabit canals. 



*NovacuUna constricta. Testa alba, tenui, transverse oblonga, 

 laeviusculd, extremitatibus rotundatis, radio mediano subconstrict^, 

 epidermide olivaceo-flavescente, postice quasi capillis intertextis ad- 

 haerentibus vestita. Lat. 2*45, long. 0"75 poll. 



Syn. Solen constrictus, Lamarck. 



6. ANNELIDES. 



HlRUDINID^. 



*Bdella lineata. B. superne brunneo-viridescens, line^ dorsal! me- 

 dia aurantiaca, infra griseo-flavescens. 



Greenish brown above, with an orange- coloured dorsal line ; be- 

 neath yellowish gray. 



7- CRUSTACEA. 

 Decapoda Brachyura. 



*Carcinus olivaceus. C. supra oUvaceo-viridescens ; infrk albus ; 

 parte anteriore marginis interni femoris spina armata. 



Greenish olive above ; beneath white, with a single spine on the 

 anterior part of the internal margin of the femur. 



*Sesarma tetragona. S. superne viridis, infra griseo-viridescens ; 

 brachiis manibusque rubris. 



Carapace green ; sternum and legs greenish gi*ay ; arms and claws 

 red. 



Sesarma quadrat a, M. Edwards. 



